2022 American Transplant Congress
Alloreactive Regulatory T Cells Release Distinct Subpopulations of Extracellular Vesicles Bearing Immune Regulatory Proteins and the TCR/CD3 Complex Under Antigen Specific Stimulation
Brigham and Women's Hospital, Boston, MA
*Purpose: Extracellular vesicles (EVs) are vital mediators of intercellular communication, playing an important role in the immune synapse and the T cell response. However, regulatory…2022 American Transplant Congress
Single-Cell CyTOF Profiling of Pediatric Immune Responses to Organ Transplantation Reveals a Novel Subpopulation of T Cells Significantly Correlating with Graft Health
1Stanford University, Palo Alto, CA, 2Rho, Durham, NC, 3National Institutes of Health, Bethesda, MD
*Purpose: Solid organ transplant is lifesaving for children with end-stage heart, liver, or kidney disease. Protection of the transplanted organ from rejection requires long-standing immunosuppression.…2022 American Transplant Congress
Impact of Immunosuppression on T-cell Responses After mRNA-Based Sars-CoV-2 Vaccination
*Purpose: Administration of mRNA-based SARS-CoV-2 vaccines confers protection from SARS-CoV-2 infection and reduces its severity in the general population. It has been suggested that mounting…2022 American Transplant Congress
Brief Human IL-2 Mutein Therapy Induces Foxp3+ T-Regulatory Cell Expansion and Donor-Specific Allograft Tolerance
*Purpose: New therapeutic approaches to the management of transplant recipients are warranted in efforts to improve outcomes.*Methods: We have engineered a modified human IL-2 protein…2022 American Transplant Congress
Immunometabolism of Regulatory T Cells Enhanced by Lipid Nanoparticles
*Purpose: Human regulatory T cell (Treg) metabolism is highly dependent upon a number of factors, including cholesterol obtained from circulating lipoproteins. We have developed high-density…2022 American Transplant Congress
Use of Organ-Specific Chimeric Antigen Receptor Promotes Liver Recruitment of Regulatory T Cells
1King's College London, London, United Kingdom, 2Quell Therapeutics, London, United Kingdom
*Purpose: Owing to their potent immune-modulatory properties, regulatory T cells (Tregs) have been explored as novel cell therapy to induce allograft tolerance, with first clinical…2021 American Transplant Congress
Double Negative T Cells Mediate Cd39-Dependent Protection in Hepatic Ischemia and Reperfusion Injury
*Purpose: Hepatic ischemia and reperfusion injury (HIRI) is a significant cause of morbidity and mortality following liver transplantation and major hepatic resections. Double negative T…2021 American Transplant Congress
Alloreactive Memory T Follicular Helper Cells Rapidly Differentiate Into Effectors Independent of B Cell Memory Following Retransplantation
Department of Surgery, Emory, Atlanta, GA
*Purpose: Donor-directed HLA antibodies are an important cause of renal allograft injury, but effective therapeutic options to prevent or eliminate donor-specific antibodies (DSA) do not…2021 American Transplant Congress
The Gut Microbiotainduces Local and Systemic Immune Modulation
*Purpose: We previously demonstrated that gut microbiome alterations, through fecal microbiota transfer (FMT) or single bacteria transfer, had specific immune effects for cardiac allograft outcome.…2021 American Transplant Congress
Distinct Phenotype and Function of Antibody-suppressor Cxcr5+Cd8+ T Cells
*Purpose: We have reported that the novel subset of antibody-suppressor CD8+ T cells (termed CD8+ TAb-supp cells) require the expression of CXCR5. In addition, alloprimed…
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